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TMP92CZ26A
92CZ26A-619
3.25 Power Management Circuit (PMC)
The TMP92CZ26A incorporates a power management circuit (PMC) for managing power
supply in standby state as protective measures against leak current in fine-process products.
The following six power supply rails are available.
Analog power supply
: AVCC & AVSS (for ADC)
3V-A, 3V-B digital I/O power supply
: DVCC3A, 3B & DVSSCOM (for general pins)
1.5V-A digital internal power supply
: DVCC1A & DVSSCOM (for general circuits)
1.5V-B digital internal power supply
: DVCC1B & DVSSCOM (for RTC, PMC)
1.5V-C oscillation power supply
: DVCC1C & DVSS1C
(for high-frequency oscillator, PLL)
Each power supply rail is independent of one another (VSS is partially shared).
Of the six power supply rails, those that are supplied in Power Cut Mode are the power
supply rail for external pins (DVCC-3A, DVCC-3B), the power supply rail for ADC (AVCC),
and the power supply rail for RTC and backup RAM (DVCC-1B). DVCC1A and DVCC1C
power supply rails are isolated internally with their signals cut off so that no flow-through
current will be generated in the LSI when the power is turned off.
• DVCC-3A, DVCC-3B
This 3V rail supplies power for holding external pins, controlling ON/OFF of external power
supplies, and interrupt input to release standby state.
• AVCC
This 3V rail supplies power in the touch panel interface for interrupt input to release
standby state.
• DVCC-1B
This 1.5V rail supplies power to the RTC, 16 Kbytes of RAM, and PMC.
Figure 3.25.1 Power Supply System
XT2
XT1 DVSS-COM
AVSS
CPU, Other logic
& RAM 272 KB
ADC
Control
RTC
High-
OSC
AVCC
DVCC-1A DVCC-1B
TMP92CZ26A
PMC
DVCC-1C
DVCC-3A,3B
DVSS-1C
I/O
RAM 16KB
INT
Port
Others
I/O
Reg
Low-OSC